Frequency analysis of Dutch vowels from 25 female speakers
article
Segments of Dutch vowels spoken by 25 female speakers in the words / h(vowel)t / were analyzed and processed further in two different ways. First the spectra of the vowel segments were measured with a set of 18 one-third octave filters. The filter levels were used to describe each vowel as a point in an 18-dimensional space. By means of a principal-components analysis this space was reduced to a lower-dimensional factor space. An ″optimal plane″ was determined in which the configuration of the average vowel points was equivalent to that in the log F//1-log F//2 plane. Second, the spectra of the same vowel segments were measured using a wave analyzer with 7 Hz bandwidth. The frequencies and levels of the first three formants were estimated; location rules were introduced to make a reproducible formant estimation possible. For both the formant and the factor representation maximum likelihood regions were computed and used to classify the vowels. The factor representation has the advantage of being simple and objective without loss of information.
TNO Identifier
4443
Source
Acustica, 29(2), pp. 110-118.
Pages
110-118
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